Appendix C

This appendix is part of the thesis “Status and trend of brook lamprey (Lampetra planeri) populations in Flanders”. It provides a dynamic map and table illustrating the total number of sample events in each watercourse and the success rate at which brook lamprey was caught. All watercourse of the VHA (Flemish Hydrographic Atlas) can be viewed when zooming in. The VHA watercourses disappear when changing the base map due to a bug in coding. This can be resolved by reloading the page.

Figure C1 shows a map with an overview of the sample events and success rate over all watercourses. The number of sample events within each watercourse is visualized as the linewidth. The success rate of catching brooklampreys is shown in a color scale, green corresponds to a success rate of 100%, yellow is 50% and red is 0%. Watercourses that did not have any available data of sample events are show in blue. The watercourses are underlayed with the Population areas. This layer can be ticked off if only the overview of the sample events and success rate is needed.

figure C1: Overview of the catch rates per watercourse

Table C1 gives an overview of the sample events and success rate over all watercourse per year. The number of sample events with (catch: c) and without (no catch: nc) observation of brook lamprey are provided per year as well as the total number of sample events and the success rate.

table C1: Overview of the catch rates per watercourse